Insulated wire.



w. E. COOK. INSULATED WIRE.

APPLICATION HLED APR. 24. 1917. 1,298,297. Patented Mar. 25,1919.

l ATTORNEYS A UNITED STATES PATENT OFFICE.-

WILLIAM E. COOK, OF NEW YORK, N. Y., .ASSIGNOR T0 INSULATION DEVELOPMENTCORPORATION, A CORPORATION OF NEW YORK.

INSULATED WIRE.

Application filed April 24, 1917. Serial No. 164,809.

To all whom it may concern:

Be it known that I, WILLIAM'E. CooK, a subject of the King of the UnitedKingdom of Great Britain and Ireland, residing at St. George, in theborough of Richmond, city of New York, county of Richmond, and State ofNew York, have invented certain new and useful Improvements in InsulatedWire, of which the following is a specification, reference being had'therein to the ac companying drawings, which form a part thereof.

My invention relates to insulated wire and more particularly to suchwire wherein the coating for the wire is composed of a fibrous materialsaturated or impregnated with asphaltum or a similar viscouscomposition.

Heretofore insulated wires have been produced which havev been composedof a conductor wire having a. covering formed of a cotton sliversecured. in place upon the wire by means of an wire by entirelyindependent operations and in entirely different machines, the coveringfor the wire being saturated or impregnated,

side' .braidwvill be entirely "dispensed with,

the covering for the wire being held in place thereon partly by means ofan, adhesive forming a bond between the cotton sliver and-the wire, andpartly by a continuous strand of a fibrous, absorbent material, such ascotton thread or cord, wound spirally about the cotton sliver andembedded therein sufiiciently deeply to be practically in discernible inthe completed product. In addition to the binding strand about thecotton sliver, I also preferably employ a similar strand incorporatedin, and bonded to, the body of the sliver before application to thewire. I also preferably use a plurality of parallel binding strandsabout the sliver and such strand-or strands may either be wound spirallyin the same direction as the sliver is wound, at the'same or differentangles, or in a direction reverse to that at which the sliver is wound,at the same or different angles.

The essential braid, a construction which admits of a.

exterior braid, said cotton sliver and said braid being applied to thesliver,

characteristic of my invention is an -1nsulated wire having no-covermore thorough saturation or impregnation Specification of LettersPatent. Patented Mar. 25, 1919..

of the insulating material, and permits the production of the coveredwire preparatory to the appllcation of asphaltum or other similarcomposition, by a single, or continuous operation in one and the samemachine.-

The invention consists primarily in an insulated wire embodying thereina conductor wire having a cotton sliver wound spirally about same withthe edges of succeeding convolutions overlapped, and an outside bindertherefor consisting of a continuous strand of absorbent material woundspirally about and embedded in said cotton sliver, said sliver and saidstrand being saturated or impregnated with a viscous material 'forming'a bond between the fibers of said sliver and between said sliver andsaid .bmdmg strands and in such other novel features of construction andcombination of parts, as are heremafter set forth and de-' scribed, andmore particularly pointed out i in the claims hereto appended.

Referring to the drawings, yFigure. 1 shows a short section of a wireembodying one form of my invention partly inelevation and partly insection, the bind- I ing strand being wound at the same pitch as thesliver;

Fig. 2 is of the invention; in v strand is wound at a'lower pitch thanthe sliver;

a similar view of another form which the I binding Fig. 3 1s a similarview of still another form of the invention, in which the binding strandis wound at a higher pitch than the sliver;

.Fig. 4 is a similar view of still another formof the invention. inwhich the binding strand is wound at the same pitch as the sliver but inthe reverse direction;

Fig. 5 is a similar form ofthe invention, in which the binding. strandis wound at a lower pitch than the sliver, but in the reverse direction;and

Fig. 6 is a similar view of still another a form of the invention, inwhich the binding strand is wound at a higher pitch than the but in thereverse direction.

Like letters refer to like parts throughout the several views.

' An insulated wire made in accordance view of still another with myinvention embodies therein a conductor wire (1 having wound spirallyabont same a compacted strip of cotton sliver b which is bonded tothewire by a stratum of adhesive material 0. i The edges. of succeedingconvolutions of said'ootton sliver overlap each other so as to present,in the finished article, a continuous covering of sub strand to befairly deeply embedded in the compacted cotton sliver, while exposingsaid sliver between the different strands.

The strands 4 may be wound about the cotton sliver at the same pitch asthe sliver is wound as shown in Fig. 1; at a lower pitch as shown inFig. 2; at a higher pitch as shown in Fig. 3; in the reverse directionand at the same pitch as shown in Fig. 4; in the reverse direction at alower pitch as shown in Fig. 5; or in the reverse direction at a higherpitch, as shown in Fig. 6.

In the form of the inventiom shown in Fig. 1, the binding strands willnot cross the lap between succeeding convolutions of the cotton sliverat any point, while in each of the other forms of the invention, thebindingstrands will cross this lap in a manner to minimize any tendencyof the sliver to unwind from the wire in the event/0f exhaustion of theadhesive bond between the wire and the sliver, or between the fibers ofthe sliver. I

In actual use, there is however, but little tend ncy of the insulatingcovering to unwind this manner. However, it is preferable to guardagainst this by having the binding strands cross the lap betweensucceeding convolutions of the sliver.

In addition to. the outside strand, or strands, above referred to, Ipreferably use a similar strand 6 inclosed by, and bonded to, the bodyof the cotton sliver, the sliver beingi folded over this strand 6, andbeing of a su cient width toinsure the desired rapid covering of thewire.

The fibers of the cotton sliver are matted when the sliver is compactedupon the wire, and the sliver c and the binding strands de are cementedtogether, or set in relation to each other, by an insulating medium,.such as anasphaltum or other composition, with which such sliver andsaid binding strands are saturated or impregnated.

A wire made in accordance with my invention. possesses the advantage ofa substantially homogeneous covering of insulating nraterial for thewire, which is thoroughly saturated or impregnated with the asphaltum orother composition and wherein the various parts are firmly bonded toeach other and to the wire. Furthermore, awire made in accordance withmy invention may be rapidly and cheaply produced and the binding strandswill be so protected by and incorporated in the cotton sliver as tominimize likelihood of the cutting of the binder as a result of abrasionor other conditions of use.

A wire made in accordance with my invention takes a smooth finish, thebinding strands not being conspicuous in the finished article. I

Having described the invention what I claim as new and desire to haveprotected by Letters Patent is 1. Insulated wire embodying therein aconductor wire having a cotton sliver wound spirally about and compactedupon same with the edges of succeeding convolutions overlapped, andan'outside binder therefor consisting of a continuous strand of absorb-'ent material wound spirally about, and embedded in, said cotton sliver,said sliver and said strand being saturated or impregnated with a.viscous material forming a bond between the fibers of said sliver andbetween said sliver and said binding strands.

2. Insulated wire embodying therein a conductor wire having a cottonsliver wound spirally about and compacted upon same with the edges ofsucceeding convolutions overlapped, and an outside binder thereforconsisting of a plurality of parallel continuous strands of absorbentmaterial wound spirally about, and embedded in, said cotton sliver, saidsliver and said'st'rands being saturated or impregnated with a viscousmaterial forming a bond between the fibers of said sliver and betweenthe sliver and said binding strands.

3. Insulated Wire embodying therein a conductor wire having a cottonsliver wound spirally about and compacted upon same with the edges ofsucceeding convolutions overlapped, and an outside binder thereforconsisting -of a continuous strand of absorbent material wound spirallyabout, and em: bedded in, said cotton sliver, and a bindin mediumbetween said conductor wire an said sliver, said sliver and said strandbeing saturated or impregnated with a viscous material forming a'bondbetween the fibers of said-sliver and between said sliver and saidbinding strands.

4. Insulated wire embodying therein a conductor wire having a cottonsliver wound spirally about and compacted upon same with the edges ofsucceeding convolutions overlapped, and an outside binder thereforconsisting of a plurality of parallel continuous strands of absorbentmaterial wound spirally about, and embedded in, said cotbond between thefibers of saidsliver and said binding strands.

5. An insulated wire embodying therein a conductor wire having a stripor ribbon consisting of cotton sliver folded upon, and bonded to, aflexible, absorbent strand wound spirally about same with the edges ofsucceeding convolutions overlapped, and an outside binder thereforconsistlng of a continuous strand of absorbent material wound spirallyabout, and embedded in, said cotton sliver, said sliver and said strandbeing saturated or impregnated with a viscous material forming a bondbetween the fibers of said sliver and between said sliver and saidbinding strands.

6. An insulated wire embodying therein i a conductor wire having a stripor ribbon sorbent material wound spirally about, and embedded in, saidcotton sliver, said sliver and said strand being saturated orimpregnated with a viscous material forming a bond between the fibers ofsaid sliver and between said sliver and said binding strands.

7. An insulated wire embodying therein a conductor wire having a stripof ribbon consisting of cotton sliver folded upon and bonded to aflexible, absorbent strand wound spirally about same with the edges ofsucceeding convolutions overlapped, and an outside binder thereforconsisting of a plurality of parallel, continuous strands of absorbentmaterial, wound spirally about', and embedded in, said cotton sliver,and a binding medium between said conductor wire and said sliver, saidsliver and said strands being saturated or impregnated with a vis cousmaterial forming a bond between the fibers of said sliver andbetweensaid sliver and said binding strands.

In witness whereof I hereunto aflix my signature, in the presence of twosubscribing witnesses, this 9th day of April, 1917.

, WILLIAM E. COOK.

Witnesses:

BERTHA MUELLER, OLARICE FRANCK.

